diff --git a/.gitignore b/.gitignore
index 308d4d9..71cd997 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 Algodat.iml
+algodat.iml
 target
\ No newline at end of file
diff --git a/algodat.iml b/algodat.iml
new file mode 100644
index 0000000..39e64ba
--- /dev/null
+++ b/algodat.iml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-api:5.3.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.apiguardian:apiguardian-api:1.0.0" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.opentest4j:opentest4j:1.1.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-commons:1.3.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.jupiter:junit-jupiter-engine:5.3.1" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.junit.platform:junit-platform-engine:1.3.1" level="project" />
+    <orderEntry type="library" name="Maven: org.jetbrains:annotations:13.0" level="project" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 940bd3b..af0be8a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -13,8 +13,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>10</source>
-                    <target>10</target>
+                    <source>8</source>
+                    <target>8</target>
                 </configuration>
             </plugin>
             <plugin>
diff --git a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/ArrayList.java b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/ArrayList.java
index 6616db3..670df78 100644
--- a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/ArrayList.java
+++ b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/ArrayList.java
@@ -39,9 +39,19 @@ public class ArrayList<E> implements List<E> {
 		return size;
 	}
 
+	@Override
+	public E remove(int index) {
+		return null;
+	}
+
+	@Override
+	public boolean remove(Object o) {
+		return false;
+	}
+
 	@NotNull
 	public Iterator<E> iterator() {
-		return new Iterator<>() {
+		return new Iterator<E>() {
 			int next = 0;
 			int current;
 
diff --git a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/LinkedList.java b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/LinkedList.java
index 78bacb3..6f7def8 100644
--- a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/LinkedList.java
+++ b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/LinkedList.java
@@ -54,9 +54,37 @@ public class LinkedList<E> implements List<E> {
 		return size;
 	}
 
+	@Override
+	public E remove(int index) {
+		E e = get(index);
+		Wrapper run = this.first;
+		if(index >= size || index < 0) {
+			throw new IndexOutOfBoundsException();
+		}
+		size--;
+		if(index == 0) {
+			first = first.succ;
+		}else {
+			for (int i = 0; i < index - 1; i++) {
+				run = run.succ;
+			}
+			run.succ = run.succ.succ;
+
+			if(index == size) {
+				last = run;
+			}
+		}
+		return e;
+	}
+
+	@Override
+	public boolean remove(Object o) {
+		return false;
+	}
+
 	@NotNull
 	public Iterator<E> iterator() {
-		return new Iterator<>() {
+		return new Iterator<E>() {
 			Wrapper next = first;
 			Wrapper current;
 
diff --git a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/List.java b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/List.java
index c29a948..4038ce3 100644
--- a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/List.java
+++ b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/List.java
@@ -4,5 +4,7 @@ package xyz.joethei.studium.algodat.praktikum.blatt2;
 public interface List<E> extends Iterable<E>{
 	boolean add(E e);
 	E get(int index);
-	int size();	
+	int size();
+	E remove(int index);
+	boolean remove(Object o);
 }
diff --git a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/Main.java b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/Main.java
index 2da7a51..5a63623 100644
--- a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/Main.java
+++ b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/Main.java
@@ -1,5 +1,7 @@
 package xyz.joethei.studium.algodat.praktikum.blatt2;
 
+import java.util.Iterator;
+
 public class Main {
 
 	public static void main(String[] args) {
@@ -22,10 +24,17 @@ public class Main {
 		}
 		System.out.println("\n");
 
+		aList.remove(5);
+
+		for (int i = 0; i < aList.size(); i++) {
+			System.out.print(aList.get(i) + "  ");
+		}
+		System.out.println("\n");
+
 		List<String> bList = new LinkedList<>();
 
 		for (int i = 1; i <= n; i++) {
-			bList.add(i + "� = " + i * i);
+			bList.add(i + "^2 = " + i * i);
 		}
 
 		/* Ausgabe der String-LinkedList bList */
@@ -51,7 +60,7 @@ public class Main {
 		List<String> dList = new ArrayList<>();
 
 		for (int i = 1; i <= n; i++) {
-			dList.add(i + "� = " + i * i);
+			dList.add(i + "^2 = " + i * i);
 		}
 
 		/* Ausgabe der String-ArrayList dList */
@@ -61,5 +70,29 @@ public class Main {
 		}
 		System.out.println("\n");
 
+		List<Integer> rList = new RingList<>();
+		for (int i = 1; i <= n; i++) {
+			rList.add(i * i);
+		}
+
+		/* Ausgabe der Integer-RingList rList */
+		System.out.println("--- Integer-RingList rList ---");
+		for (int i = 0; i < rList.size(); i++) {
+			System.out.print(rList.get(i) + "  ");
+		}
+		System.out.println("\n");
+
+		for(int i : rList) {
+			System.out.print(i + " ");
+		}
+		System.out.println();
+
+		Iterator<Integer> iter = rList.iterator();
+		while(iter.hasNext()) {
+			System.out.print(iter.next() + " ");
+		}
+		System.out.println();
+
+
 	}
 }
diff --git a/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/RingList.java b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/RingList.java
new file mode 100644
index 0000000..886685c
--- /dev/null
+++ b/src/main/java/xyz/joethei/studium/algodat/praktikum/blatt2/RingList.java
@@ -0,0 +1,88 @@
+package xyz.joethei.studium.algodat.praktikum.blatt2;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Iterator;
+
+public class RingList<E> implements List<E> {
+	private class Wrapper {
+		E e;
+		Wrapper succ;
+
+		Wrapper(E e) {
+			this.e = e;
+			succ = null;
+		}
+	}
+
+	private Wrapper first;
+	private Wrapper last;
+	private int size;
+
+	RingList() {
+		first = new Wrapper(null);
+		last = first;
+		last.succ = first;
+		size = 0;
+	}
+
+	public boolean add(E e) {
+		Wrapper w = new Wrapper(e);
+		last.succ = w;
+		last = w;
+		last.succ = first;
+		size++;
+		return true;
+	}
+
+	public E get(int index) {
+		Wrapper wRun;
+		if (index < 0 || index >= size) {
+			throw new IndexOutOfBoundsException();
+		}
+		wRun = this.first.succ;
+		for (int iRun = 0; iRun < index; iRun++) {
+			wRun = wRun.succ;
+		}
+		return wRun.e;
+	}
+
+	public int size() {
+		return size;
+	}
+
+	@Override
+	public E remove(int index) {
+		return null;
+	}
+
+	@Override
+	public boolean remove(Object o) {
+		return false;
+	}
+
+	@NotNull
+	public Iterator<E> iterator() {
+		return new Iterator<E>() {
+			Wrapper next = first.succ;
+			Wrapper current;
+
+			public boolean hasNext() {
+				return next != first;
+			}
+
+			public E next() {
+				current = next;
+				if (next != first) {
+					next = next.succ;
+				}
+				return current.e;
+			}
+
+			public void remove() {
+				throw new UnsupportedOperationException();
+			}
+		};
+	}
+
+}
diff --git a/src/main/java/xyz/joethei/studium/algodat/DuplicatesList.java b/src/main/java/xyz/joethei/studium/algodat/vorlesung/DuplicatesList.java
similarity index 95%
rename from src/main/java/xyz/joethei/studium/algodat/DuplicatesList.java
rename to src/main/java/xyz/joethei/studium/algodat/vorlesung/DuplicatesList.java
index eb82d3d..b3445cf 100644
--- a/src/main/java/xyz/joethei/studium/algodat/DuplicatesList.java
+++ b/src/main/java/xyz/joethei/studium/algodat/vorlesung/DuplicatesList.java
@@ -1,4 +1,4 @@
-package xyz.joethei.studium.algodat;
+package xyz.joethei.studium.algodat.vorlesung;
 
 import java.util.ArrayList;
 import java.util.List;